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www.reference.com/science/causes-red-blood-cells-small-size-38a469ff4fc45823

Microcytic anemia is the condition wherein red blood cells are smaller than normal, and it is primarily caused by iron deficiency anemia and thalassemia, according to Dr. Siamak T. Nabili writing for eMedicineHealth. Iron deficiency anemia occurs due to limited or inadequate iron intake.

www.reference.com/science/red-blood-cells-76cc71f6ea4d6f67

Red blood cells carry oxygen and nutrients to the tissues in the body and take away carbon dioxide. They are also called erythrocytes. They get their red color from a pigment called hemoglobin, and it is the hemoglobin that actually carries the oxygen and carbon dioxide.

www.reference.com/article/large-red-blood-cells-symptom-cancer-fa5d81e07c36fdfc

Large red blood cells, called macrocytosis, are not a cancer symptom but may signal a problem that needs to be examined medically, explains Mayo Clinic. Macrocytosis is not a disease and does not produce symptoms or signs. Vitamin B-12 or folate deficiencies, liver disease, hypothyroidism and alcoho

www.reference.com/science/red-blood-cells-specialized-82bbe77037c57d32

According to Springfield Technical Community College, the primary role red blood cells play in the body is to transport oxygen from the lungs to the various body tissues. To carry out this task, the cells are filled with a substance called hemoglobin. Hemoglobin is so important to red blood cells th

www.reference.com/article/long-red-blood-cells-live-f32452136131161a

A normal red blood cell lives for about 120 days. It takes about two days for the body to manufacture each red blood cell, and about two million are turned out every second. Production of new red blood cells occurs in the bone marrow.

www.reference.com/article/blood-red-296fb8cb15832643

Humans have red blood because it contains iron. Another way of explaining why humans have red blood is that the color is due to hemoglobin, which is the protein associated with iron that makes blood red.

www.reference.com/science/red-blood-cell-adapted-99c28c8eff1730a9

Two adaptations that have been made by the red blood cell are the lack of a nucleus and organelles, or small, specialized bodies in the cell. This allows for more room in the blood cell for hemoglobin.

www.reference.com/world-view/cause-enlarged-red-blood-cells-bdc70943b19094e

According to the Mayo Clinic, enlarged red blood cells, or macrocytosis, is a non-specific medical condition that has a number of different causes. Among the most common are vitamin B12 deficiency, folate deficiency, alcoholism, hypothyroidism (under-active thyroid) and liver disease. Other causes i

www.reference.com/article/should-red-blood-cells-urine-bdd75b62841276db

It is normal for there to be a very small number of red blood cells in urine, according to MedlinePlus. However, the exact amount that counts as normal may differ, depending on the laboratory that performs the test.

www.reference.com/world-view/enlarged-red-blood-cells-mean-f91c120ea5576137

Macrocytosis is a medical term used to describe enlarged red blood cells, according to Mayo Clinic. This medical condition usually does not cause any symptoms, but it may be a symptom of an underlying disease or infection.